How to Stay Safe From Methanol Poisoning Abroad

Methanol poisoning is a real risk. You cannot spot it since it’s odourless and tasteless and usually hides in counterfeit spirits and homemade alcohol. The first symptoms are identical to a severe hangover. As a result, most travellers wait too long before seeking medical help. Since treatment works best if administered shortly, this delay can be very harmful. 

A few simple precautions can reduce your risk of methanol poisoning. In this guide, we describe the symptoms of methanol poisoning and when they occur. We list all countries for which there is an official UK travel warning and tips on how to enjoy your night out safely.

Key Takeaways

• Methanol is odourless and tasteless, so there’s no reliable way to detect it in a drink. Prevention comes down to where and what you drink, not testing the glass.
• Early symptoms mimic a bad hangover, but warning signs like blurred vision, breathlessness, or abdominal pain appearing 12 to 48 hours after drinking need urgent medical attention.
• Vision changes are the clearest red flag. Blurring, sensitivity to light or seeing static like an old TV screen should never be dismissed as tiredness.
• As of late 2025, the UK Foreign Office lists 29 destinations with methanol poisoning warnings, including popular gap-year stops in Southeast Asia and South America.
• Sticking to sealed, branded drinks from licensed bars cuts your risk significantly, and it’s a habit worth building into any trip, not just backpacking routes.

What is methanol poisoning?

Methanol poisoning happens by consuming methanol, a highly toxic chemical used in industrial processes. Methanol is very similar in composition to ethanol, commonly known as drinking alcohol. However, whereas the body processes ethanol quickly, it converts methanol into formic acid, which can cause irreparable damage to the optic nerve and to the central nervous system. The effects of methanol poisoning can take hours to develop.

The early effects of methanol poisoning may seem to be similar to a bad hangover. With time, though, the toxic effects of methanol can cause permanent vision loss or even be fatal.

The most common source of methanol poisoning is counterfeit, illegally sold, or homebrewed alcohol. This is why the source of the drink is more important than the amount consumed. Countries with poorly regulated alcohol production are more at risk.

Why methanol ends up in alcoholic drinks

Methanol can enter a drink in two ways. The most common way is through deliberate adulteration. Producers of homemade or counterfeit spirits use it to increase the strength of a spirit without actually having to provide more ethanol. Such practice is most common in countries where the taxation of spirits is high, or their sale is restricted.

The second cause is accidental contamination of spirits during production. Traditional methods of spirits production using distillation can concentrate methanol, usually removed by filtration. These contaminants can occur in homemade spirits and unregulated rice wines, not by intention, but because there is no process to remove it.

Trace amounts of methanol, a natural by-product of fermentation, are found in commercially produced vodka and other branded spirits. The amount, though, is too low to cause any harm.

Methanol poisoning symptoms and timeline

Typical symptoms of methanol poisoning occur within hours of consumption and can be indistinguishable from a typical hangover: nausea, vomiting, dizziness, loss of coordination, drowsiness.

Between 12 and 48 hours later, the patient will develop more serious symptoms: abdominal pain, breathlessness, vertigo and hyperventilation. Vision symptoms are the clearest tells and include blurred vision, sensitivity to light and seeing ‘fizzies’ or TV static. With no treatment, the patient can develop seizures and even fall into a coma.

Anyone exhibiting these symptoms after a night out drinking should seek urgent medical attention. In particular, anyone experiencing vision symptoms should not delay seeking medical help.

How methanol poisoning causes blindness

Methanol is metabolised in the liver to formic acid, which then can accumulate in the bloodstream. This formic acid is especially toxic to the optic nerve, resulting in vision loss.

UK Government statistics indicate that even as little as 10ml of methanol could cause blindness. Around 30ml of methanol could lead to death. This is why if you develop any vision problems after drinking abroad, you must seek immediate medical assistance. Blurred vision and sensitivity to light are usually the first signs of damage to the optic nerve, and the problem can quickly get worse.

Methanol poisoning travel warnings: which countries

Methanol poisoning warnings are in place for 29 countries. Indonesia, India and Russia report the highest number of suspected cases globally, while Laos methanol poisoning incidents and cases in Vietnam have also affected British travellers.

Note: The list above is updated from time to time with new reports of methanol poisoning. Check the latest travel advice from the FCDO before travelling.

How to stay safe when drinking abroad

Knowing how to avoid methanol poisoning comes down to where you are and what you choose to drink, since you can’t taste, smell or see it. Doing a home flame test or other internet-suggested tests is not a reliable solution. Just because a drink tastes normal does not mean that it is safe to drink.

What to check before you drink:

• Buy from licensed bars, restaurants and hotels rather than from street vendors and people who are not licensed to sell.
• Choose sealed, branded bottles and cans. Be careful when opening them to ensure that the seal breaks.
• Watch spirits being poured to ensure your drink has not been pre-mixed.
• Be cautious with anything served from buckets or jugs, and free shots in general.
• Beer, wine and cider are generally safer than spirits, because they are less commonly subject to adulteration.
• Very cheap spirits are often tampered with. Try to view them as suspicious rather than cheap.

Advice for gap-year travellers and backpackers

A hostel bar crawl, welcome shots, and cheap local spirits are where backpackers face the most risk. So, the same rules apply here and even more for big nights out. If people in your group start getting ill after drinking together, treat it seriously as a medical emergency rather than just having ‘bad luck’. It is especially important to stay with friends and other travellers who know where you are staying rather than going out alone in unfamiliar locations.

It’s worth saving the local emergency number and checking that your travel insurance covers you for any medical treatment and for repatriation should something go seriously wrong. Evacuation cover often carries exclusions worth checking before you sign, so it’s worth reading the policy rather than assuming you’re covered.

What to do if you suspect methanol poisoning

If you or someone you’re with shows symptoms after drinking abroad, treat it as a medical emergency:

• Get to a hospital immediately. Don’t wait to see if it improves, and don’t sleep it off.
• Tell medical staff exactly what was drunk, when, and how much, especially if the source was unlicensed or homemade.
• Act fast if several people in your group feel unwell after drinking together. This points to a shared bad batch, not coincidence.

Methanol poisoning treatment in hospital centres focuses on the methanol antidote, either ethanol or fomepizole. It stops the body from turning methanol into formic acid. In more severe cases, doctors might use dialysis to remove methanol and its by-products from the blood.

Treatment is effective if administered within the first 10-30 hours of consuming methanol. Getting to a hospital quickly is therefore paramount.

Planning a safer trip: book a pre-travel consultation

There’s no vaccine against methanol poisoning, but the destinations that carry warnings for it, including India and much of Southeast Asia, often carry other travel health risks worth planning for properly. If you’re heading to India, for example, rabies is another risk worth understanding before you go, and knowing how long your protection actually lasts helps you plan boosters around a longer trip.

A pre-travel consultation at London Vaccination Clinic covers this kind of destination-specific planning in one visit, rather than leaving you to piece it together. We have four central London clinics, with early morning, evening and weekend appointments that fit around exams, work, or a gap-year send-off.

Staying safe on the road

Methanol poisoning abroad is rare, but it’s serious enough to plan around, especially given how easily it can be mistaken for a bad hangover. The good news is that the precautions are simple: stick to licensed venues and sealed, branded drinks, be cautious with spirits and free shots, and never wait out symptoms that could be something more than a night out catching up with you.

Vision changes, breathlessness or abdominal pain after drinking abroad are always worth an urgent trip to hospital. A little planning before you go, and a bit of caution once you’re there, covers most of the risk.